But it remains doubtful whether the similar cultural imprint indicates an original identity of stock.
(a) A secondary electron image of a complex ash particle from the Fuego eruption with a single vesicle imprint indicated by the red rectangle; (b) en enlarged view of the vesicle imprint with the selected profile across the imprint running from A to B; (c) length and depth of imprint as determined by the digital elevation model of the ash particle constructed using the MeX software package.
Thus, two identical and closely located ICR2 sequences may acquire different methylation imprints, indicating that features, in addition to the ICR2 sequence itself, are necessary for imprinting establishment.
In the present study, the QTL for entire loin weight showed paternal imprinting indicating that only the maternal allele is expressed at this QTL.
Previous studies showed that lncRNAs are likely to be involved in many diverse biological processes, including cell proliferation, differentiation, cell cycle, apoptosis and invasion, marker of cell fate, and parental imprinting, indicating that they may play a major role in the regulation of eukaryotic genome [ 17– 17].
Markers significant for imprinting indicated that BMI is subject to imprinting.
Studies of the evolution of imprinting indicate that it seems to have emerged at different times at different loci [ 22- 24].
Furthermore, the difference in Igf2r and Airn expression between EPI (biallelic Igf2r and no Airn) and VE (reciprocal imprinting) indicate a distinct mechanism during epiblast differentiation that activates Airn (since Airn is already expressed in VE but the methylation dynamics are the same in EPI-EM and VE-EX).
The distribution of known EXEL imprinted genes indicates that imprinted silencing by epigenetic initiators is extended in extra-embryonic lineages compared to the embryo.
The presence of H3K27me3 at up to a quarter of developmentally expressed imprinted genes in both mouse ESCs and MEFs implies that this repressive histone mark may, in some cases, associate with the inactive imprinted allele, indicating involvement in imprinting control.
